Then you need to do some reading. It's good practice, when you accept a commission to write a feature, to do your own research. It means that you can stand over what you have written, and you won't be wrong footed by a publication that you should have known about but didn't.
ResearchGate is good for networking, but primary research is something that you need to do yourself.
Incidentally, there's a huge caregiver burden literature,so you will also find useful things in the dementia and disability literature, both of which are relevant t your article.